Fountain-pen.



G. SWEETSER. FOUNTAIN PNN.

APPLIGATION FILED SEPT. 18, 1905.

PATNNTED FEB. 27, 1906.l

"UNITED sTAgrEs PATENT OFFICE.,

GEORGE swEETsER, oF UPPER NoRwoon-.RNGLANn AssIGNoR To THOMAS DE LAND.

LA RUE AND COMPANY, LIMITED, OF LONDON, ENG- FOUNTAIN-PEN.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed September 18, 1905. Serial No. 278,9S.

and useful Improvements in Fountain-Pens,

of which the following is a specification.

This invention relates to fountain-pens of the kind that contain theirown ller, and has for its main object the provision of anarrangement bywhich the 'Iilling can de aceomplishedv in .a more simple manner thanheretofore.

There are other improvements in detail, as hereinafter set forth. p

In carrying out my invention I slightly` en'- large or longitudinallygroove the bore of the reservoir for a short distance at the bottom orpen end-\ and fit it-swith a lightly-packed piston and rod extendingthrough the p end of the pen.,

The drawing is a longitudinal section of a pen made acoordin to thisinvention.

a is the reservoir; the pen-carrier.

c is a longitudinal rod passing through th'e top end of the reservoirand terminating in a screw cap or handle c.

d is the piston on the rod c, lightlypacked to 'fit the bore for thegreater part ofits length. At the pen end, however, as will be seen fromythe drawing, the bore is enlarged at e or longitudinal grooves areformed in the sides thereof, so as to allow of the passage of ink aroundthe piston Whenit is atthe enlarged part of the bore.

When charging, the nozzle of the pen is immersedin ink and the cplorhandle c unl screwed and pulled back. e imprisoned air 1n the reservoirleaks past the piston into the 4o bottom portion of the reservoir. Uponthe rod being pushed quickly in this air is ejected, a vacuum is formedin the top portion of the reservoir, and when the piston arrives at theend of the stroke Where the bore is enlarged ink iows round'the pistonand fills the reservoir owing to the pressure of the atmosphere.

In order that the en may be carriedy in any position without eakage,thepiston-rod may carry What I claim isa l 1. Ina fountain-pen theeombinatlon of a reservoir having an enlarged boreat the pen end,alongitudinal rod passing out through 5 5' the rear of the reservoir anda piston xed to the rod `and lightly fitting the reservoir in the rearof the en scribed.

2. In a fountain-pen the combination of a 6o rear of the enlarged bore,a valve on the forward end of the rod and la valve-seating for the valvesubstantially as described.

GEORGE SWEETSER.

Witnesses:

ALFRED NUTTING, FREDK. L. RAND.

a valve f, which seats itself on a 5o seatingf in the pen-carrier. l

arged bore substantially as dey

